고수님들 코드 한번 봐주세요.

<?phpif (!defined('_GNUBOARD_')) exit; // 최신글 추출// $cache_time 캐시 갱신시간function latest_group($skin_dir='', $gr_id, $rows=10, $subject_len=40, $cache_time=1, $options=''){    global $g5;     if (!$skin_dir) $skin_dir = 'basic';     if(preg_match('#^theme/(.+)$#', $skin_dir, $match)) {        if (G5_IS_MOBILE) {            $latest_skin_path = G5_THEME_MOBILE_PATH.'/'.G5_SKIN_DIR.'/latest/'.$match[1];            if(!is_dir($latest_skin_path))                $latest_skin_path = G5_THEME_PATH.'/'.G5_SKIN_DIR.'/latest/'.$match[1];            $latest_skin_url = str_replace(G5_PATH, G5_URL, $latest_skin_path);        } else {            $latest_skin_path = G5_THEME_PATH.'/'.G5_SKIN_DIR.'/latest/'.$match[1];            $latest_skin_url = str_replace(G5_PATH, G5_URL, $latest_skin_path);        }        $skin_dir = $match[1];    } else {        if(G5_IS_MOBILE) {            $latest_skin_path = G5_MOBILE_PATH.'/'.G5_SKIN_DIR.'/latest/'.$skin_dir;            $latest_skin_url  = G5_MOBILE_URL.'/'.G5_SKIN_DIR.'/latest/'.$skin_dir;        } else {            $latest_skin_path = G5_SKIN_PATH.'/latest/'.$skin_dir;            $latest_skin_url  = G5_SKIN_URL.'/latest/'.$skin_dir;        }    }     $cache_fwrite = false;    if(G5_USE_CACHE) {        $cache_file = G5_DATA_PATH."/cache/latest-group-{$gr_id}-{$skin_dir}-{$rows}-{$subject_len}.php";         if(!file_exists($cache_file)) {            $cache_fwrite = true;        } else {            if($cache_time > 0) {                $filetime = filemtime($cache_file);                if($filetime && $filetime < (G5_SERVER_TIME - 3600 * $cache_time)) {                    @unlink($cache_file);                    $cache_fwrite = true;                }            }             if(!$cache_fwrite)                include($cache_file);        }    }     if(!G5_USE_CACHE || $cache_fwrite) {        $list = array();        $sql_common = " from {$g5['board_new_table']} a, {$g5['board_table']} b, {$g5['group_table']} c where a.bo_table = b.bo_table and b.gr_id = c.gr_id and b.bo_use_search = 1 ";        $sql_common .= " and b.gr_id = '$gr_id' ";        // $sql_common .= " and a.bo_table not in ('aaaa', 'bbbb') ";        $sql_common .= " and a.wr_id = a.wr_parent ";        $sql_order = " order by a.bn_id desc ";        $sql = " select a.*, b.bo_subject, c.gr_subject, c.gr_id {$sql_common} {$sql_order} limit 0, {$rows}";		$result = sql_query($sql); 		for ($i=0; $row=sql_fetch_array($result); $i++) { 			$sql = " select * from {$g5['board_table']} where bo_table = '{$row['bo_table']}' ";			$board = sql_fetch($sql);			$gr_subject = $row['gr_subject']; 			$tmp_write_table = $g5['write_prefix'] . $row['bo_table'];			$row2 = sql_fetch(" select * from {$tmp_write_table} where wr_id = '{$row['wr_id']}' "); 			$list[$i] = $row2;			$list[$i] = get_list($row2, $board, $latest_skin_url, $subject_len);			$list[$i]['bo_subject'] = $row['bo_subject'];			$list[$i]['bo_table'] = $row['bo_table'];		}         if($cache_fwrite) {            $handle = fopen($cache_file, 'w');            $cache_content = "<?php\nif (!defined('_GNUBOARD_')) exit;\n\$gr_subject='".$gr_subject."';\n\$list=".var_export($list, true)."?>";            fwrite($handle, $cache_content);            fclose($handle);        }    }     ob_start();    include $latest_skin_path.'/latest.skin.php';    $content = ob_get_contents();    ob_end_clean();     return $content;}   ?>